P2195 — Lambda Sensor Signal Stuck Lean Bank 1 Sensor 1
| Meaning | The engine control unit has noticed that the oxygen sensor on the driver or intake side of the exhaust is constantly reading too much oxygen. This means the computer thinks the engine is running on too much air and not enough fuel, so it tries to add more fuel to balance it out. |
| Family | Powertrain (P) |
Typical symptoms
Engine might feel slightly sluggish or hesitate when you press the gas pedal
Rough idle when the engine is warm
Common causes
An intake air leak or a vacuum leak letting unmeasured air into the engine
A weak fuel pump or a clogged fuel filter keeping fuel pressure too low
An exhaust leak near the front sensor affecting the air reading
What to do
Frequently asked questions
What does code P2195 mean?
Lambda Sensor Signal Stuck Lean Bank 1 Sensor 1. The engine control unit has noticed that the oxygen sensor on the driver or intake side of the exhaust is constantly reading too much oxygen. This means the computer thinks the engine is running on too much air and not enough fuel, so it tries to add more fuel to balance it out.
Can I keep driving with code P2195 active?
Yes, no known limitation
Common causes — P2195
A faulty oxygen sensor that is failing to report correctly An intake air leak or a vacuum leak letting unmeasured air into the engine A weak fuel pump or a clogged fuel filter keeping fuel pressure too low An exhaust leak near the front sensor affecting the air reading
How do you fix code P2195?
You should have a mechanic check the live data from the oxygen sensor and inspect the intake hoses and exhaust for leaks as soon as you have time. Driving for a long time with an incorrect fuel mixture can eventually damage the catalytic converter.
We are ECU specialists: diagnosis, file repair and remapping for cars, bikes, trucks and agricultural vehicles.
Contact usRelated codes
- P2100 — Throttle Actuator Control Motor Circuit/Open
- P2101 — Throttle Actuator Control Motor Circuit Range/Performance
- P2102 — Throttle Actuator Control Motor Circuit Low
- P2103 — Throttle Actuator Control Motor Circuit High
- P2104 — Throttle Actuator Control System - Forced Idle
- P2105 — Throttle Actuator Control System - Forced Engine Shutdown
- P2106 — Throttle Actuator Control System - Forced Limited Power
- P2107 — Throttle Actuator Control Module Processor
- P2108 — Throttle Actuator Control Module Performance
- P2109 — Throttle/Pedal Position Sensor "A" Minimum Stop Performance
- P210A — The cable to component K38/3(Starter lockout relay) has shor...
- P2110 — Throttle Actuator Control System - Forced Limited RPM